Why not put in "pull down" type plug. I have made up more than a few with rubber tubing attached to the end of the wire. Easy cheap and out of the way.
The future of charging will be inductive - not plug in. Look for this system to rapidly be accepted in the next couple years.
Plug in will still be there, but at home charging means you just drive the EV into the garage on top of the flat floor mounted inductive "transmitter". Will also require an inductive "receiver" on the bottom of the EV.
This also means that wires, in a roadway, could be used to constantly charge an EV as it travels down that road.
Exciting stuff.
Regarding the wire from the house, you can easily put in three AWG 3 stranded THHN wires (L1, L2 and neutral) and a ground in 1.5 inch conduit.
Steve
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consulting on geothermal heating/cooling & rational energy use since 1990
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